Taken from the "Journal of the American Irish Historical Society," this work contains two passenger lists: one of about 500 names of Irish immigrants to New England between 1716 and 1769, and the other of 1,000 who went to Virginia between 1623 and 1666. O'Brien has also assembled a rich assortment of colonial vital records on the Irish in Georgetown, Maine, Portsmouth, New Hampshire, Philadelphia, Pittsburgh, and Washington, D.C.